4.8 Financial experts say retirement accounts are one of the best tools for saving and investing for the future. Are millennials and Gen Xers financially prepared for the future? A survey of American adults conducted by INSIDER and Morning Consult revealed the following: HAS A RETIREMENT SAVINGS ACCOUNT AGE GROUP Yes No Millennials 579 528 Gen X 599 532 Source: Data extracted from "Millennials are delusional about the future, but they aren't the only ones," bit.ly/2KDeDK9. a. Give an example of a simple event. b. Give an example of a joint event. c. What is the complement of "Has a retirement savings account"? d. Why is "Millennial and has a retirement savings account" a joint event